Apple today released a Security Update for QuickTime 7.1.6 via Mac OS X's Software Update utility and on the Web. According to the company, this update is recommended for all users and improves the security of QuickTime 7.1.6. It protects against a situation where visiting a malicious Web site may lead to arbitrary code execution, and the disclosure of sensitive information. The update weighs in at 1.4MB and is available here.